using System;

public class Program

{

    public static void Main()

    {

        int i,n;

        Console.WriteLine("The pattern like :");

        Console.WriteLine("\n\n");

        for(i=1;i<=4;i++);

        {

            for(n=1;n<=i;n++);

            {

            Console.Write(i);

        }

            Console.WriteLine("\n");

    }

}

}

​